Allicdata Part #: | ISL6552CBZA-ND |
Manufacturer Part#: |
ISL6552CBZA |
Price: | $ 0.00 |
Product Category: | Integrated Circuits (ICs) |
Manufacturer: | Intersil |
Short Description: | IC REG CTRLR BUCK 20SOIC |
More Detail: | Buck Regulator Positive Output Step-Down DC-DC Co... |
DataSheet: | ISL6552CBZA Datasheet/PDF |
Quantity: | 1000 |
1 +: | 0.00000 |
Specifications
Series: | -- |
Packaging: | Tube |
Part Status: | Obsolete |
Output Type: | PWM Signal |
Function: | Step-Down |
Output Configuration: | Positive |
Topology: | Buck |
Number of Outputs: | 4 |
Output Phases: | 4 |
Voltage - Supply (Vcc/Vdd): | 4.75 V ~ 5.25 V |
Frequency - Switching: | 50kHz ~ 1.5MHz |
Duty Cycle (Max): | -- |
Synchronous Rectifier: | -- |
Clock Sync: | No |
Serial Interfaces: | -- |
Control Features: | Enable, Frequency Control, Power Good |
Operating Temperature: | 0°C ~ 70°C (TA) |
Package / Case: | 20-SOIC (0.295", 7.50mm Width) |
Supplier Device Package: | 20-SOIC |
Base Part Number: | ISL6552 |
Description
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ISL6552CBZA is a DC-DC switching controller, which is used for generating a pulse width modulated (PWM) signal for controlling the switching power supplies, such as front-end boost, flyback, and SEPIC converters. Device ISL6552CBZA is a current-mode control and circuit with low-voltage, step-down and step-up applications by connecting an external power transistor, current sensing resistor and an inductor.Application Field
ISL6552CBZA is used in the switching power supplies applications in the field of automotive and aerospace, which uses the pulse width modulation (PWM) method to provide a variable output voltage. Such type of switching power supplies are used in automotive and aerospace domains as it provides faster response to the input voltage changes, offers better voltage regulation, reduces the electromagnetic interference and is much lighter than other types of power supplies. It is also used in various consumer electronics such as telecom applications, home-appliances and electronic power systems such as laptops, mobile phones and digital cameras.Working Principle
The operating principle of ISL6552CBZA works on the basis of current-mode control topology. A current sensing resistor is connected in between the input voltage Vin and output voltage Vout. When the input voltage rises, the output voltage will remain at the same value, while the current flowing through the current sense resistor will increase, providing a proportional increase in the current flowing through the low-side power MOSFET driven by the ISL6552CBZA chip.The ISL6552CBZA controller uses the voltage control feedback to regulate the output voltage. The voltage is compared with the voltage reference channel in the ISL6552CBZA. If difference exists, the ISL6552CBZA chip drives the error amplifier and fixes the current loop output to compensate the error, thus maintaining the output voltage.In addition to regulated voltage output, the ISL6552CBZA chip also offers various protection features like over-current protection, over-voltage protection and thermal shutdown. This chip is capable of generating higher efficiency and better output voltage regulation than the voltage feedback control method.This chip is designed with a BiCMOS process, which makes its structure both cost- and power-efficient, since it is capable of providing a high frequency switching performance with low input voltage. Furthermore, the chip requires a low external component count, making it easier to integrate into compact and portable systems.The specific data is subject to PDF, and the above content is for reference
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